CN106566394A - Semiconductive shielding graphene coating special for cable and preparing method of semiconductive shielding graphene coating - Google Patents

Semiconductive shielding graphene coating special for cable and preparing method of semiconductive shielding graphene coating Download PDF

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CN106566394A
CN106566394A CN201610918416.0A CN201610918416A CN106566394A CN 106566394 A CN106566394 A CN 106566394A CN 201610918416 A CN201610918416 A CN 201610918416A CN 106566394 A CN106566394 A CN 106566394A
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graphite
groups
cable
graphene
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CN106566394B (en
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陈庆
曾军堂
王镭迪
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Haifeng Mei Da Chemical Coatings Co., Ltd.
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Chengdu New Keli Chemical Science Co Ltd
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    • C09D167/00—Coating compositions based on polyesters obtained by reactions forming a carboxylic ester link in the main chain; Coating compositions based on derivatives of such polymers
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
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Abstract

The invention provides a semiconductive shielding graphene coating special for a cable and a preparing method of the semiconductive shielding graphene coating. Graphite, a grouting agent and the like are shorn and ground in the colloidal state through a screw extruder, and the semiconductive shielding graphene coating is obtained; the coating prepared through the method can evenly coat rubber of the cable, and the prepared semiconductive shielding graphene coating has the extremely-high adhesion, film-forming property, isolation performance and shielding performance. According to the semiconductive shielding graphene coating and the preparing method, the graphite is directly used as a raw material to prepare the semiconductive shielding graphene coating through the screw extruder, and the technical defect that the production cost is directly increased due to the fact that the graphene directly serves as the production raw material is overcome; in addition, the screw extruder serves as a generator, the production process is simple, and the cost is greatly reduced; and the production process is free of environment pollution, the yield is high, and the obvious market application value is achieved.

Description

A kind of special semi-conductive screen Graphene coating of cable and preparation method
Technical field
The present invention relates to a kind of shielding material of cable, and in particular to a kind of special semi-conductive screen Graphene coating of cable And preparation method.
Background technology
For the destruction for protecting electric power transmission cable insulation to cause from concentrating due to electric field stress, while in order to Suppress charge inducing, in electric power transmission cable, the use EP rubbers of rated voltage 3.6/6.6 (7.2) more than kV and poly- Vinyl chloride as insulating barrier cable, and the use crosslinked polyethylene and poly- second of rated voltage 1.8/3.0 (3.6) more than kV Alkene should all have conductor shielding and insulation screen as the cable of insulating barrier.Respectively each design one and half in outside is led in insulating barrier Shield layer.The quality of semiconductive shieldin material plays vital effect to the use safety and service life of cable.Partly lead Composite used by shield layer must keep stable relatively low level at different temperatures and during life-time service.It is logical It is common to semiconducting rubber screen layer be prepared from through mechanical mixture with conductive black by rubber, also have at present by Graphene is used for semi-conductive screen rubber.
Graphene is by SP2The carbon atom of hybrid form be arranged closely together with bi-dimensional cellular shape lattice structure A kind of carbon simple substance stone, used as the two-dimentional new material that a kind of conductivity is very excellent, its resistivity is 10-8Ω m, by graphite Alkene is used for the conductive filler of polymer semiconductive shieldin material can keep good conductivity in the case of low loading.Middle promulgated by the State Council Bright number of patent application 201320747585.4 discloses a kind of high tension cable with graphene conductive layer, by current high-voltage crosslinking electricity The electrically conductive graphite coating adopted outside the nonmetallic external sheath layer of cable changes into graphene conductive coating, can greatly improve the non-gold of cable The accuracy of category sheath mechanical sealing performance detection and the safety and reliability of cable operation.
Chinese invention patent application number 201510524743.3 discloses a kind of graphene oxide insulating radiation coating, by oxygen Graphite alkene is configured to dispersion liquid addition and is mixed to prepare with resin curing agent by resin, and the invention is directly using graphene oxide Raw material, it is expensive due to its, graphene oxide is directly increased into production cost directly as raw materials for production, it is unfavorable for big rule Mould popularization and application.
Chinese invention patent application number 201410480336.2 disclose a kind of modified toner coating of Graphene and Its production technology, Graphene is added by a certain percentage in high speed mixer and is mixed, and by hot melt, roll-in, grinding stone is obtained Black olefine resin coating.The program on the one hand directly using Graphene as raw material addition resin material prepare coating cause coating into This is higher, and on the other hand, powdery paints prepared by the program needs to be configured to coating finished product to be just processed, it is impossible to direct profit With.
Chinese invention patent application number 201410727717.6 proposes a kind of preparation method of graphite ene coatings, by graphite Alkene is added in water or organic solvent, is crushed Graphene using ultrasonic method, then substrate to be sprayed is heated into 120-130 DEG C, by stone In substrate surface, the program needs to preheat substrate to be sprayed black alkene solution spraying, thus treating sprayed on material attribute has It is certain to require, and the coating prepared using the method adhesive force in substrate is poor, and film property is weaker, easy to fall off, isolation Effect is poor.
According to above-mentioned, on the one hand open one kind is there is presently no for the special semi-conductor electricity shielding Graphene coating of cable Low cost, scale ground prepare scheme and prepare Graphene cable coating to meet Graphene cable market demand.Further, it is existing Graphene coating preparation scheme mainly directly prepares coating by the use of Graphene as raw material in technology, and production cost is higher, no Beneficial to large-scale promotion application.
The content of the invention
There is presently no a kind of for the special semi-conductive screen Graphene coating of cable is directly raw material using graphite, low Cost, scale ground prepare the scheme that scheme prepares Graphene cable coating, and the present invention proposes a kind of special semiconductive screen of cable Graphene coating and preparation method are covered, by screw extruder, graphite and cementing agent etc. is carried out into shearing under colloidal state and is ground Mill, obtains a kind of semi-conductive screen Graphene coating, coating prepared by the present invention can on cable rubber even application, and have High cementability, film property, isolation, shielding.
To solve the above problems, the present invention is employed the following technical solutions：
First, the present invention discloses a kind of special semi-conductive screen Graphene coating of cable, by the raw material system of following mass percents It is standby to form：
Graphite raw material 18-43%
Cementing agent 55-80%
Dispersant 0.5-1%
Stabilizer 0.5-1%
Wherein, described graphite raw material is in crystalline flake graphite, expanded graphite, highly oriented graphite, thermal cracking graphite, graphite oxide At least one, in described cementing agent alkyd resin, polyurethane resin, polypropylene ester, acrylic resin and phenolic resin extremely Few one kind, described dispersant is sodium lauryl sulphate, dodecylbenzene sodium sulfonate, polyvinylpyrrolidone, 1- pyridine acids In at least one, the stabilizer be in tetramethylolmethane, Pulvis Talci, single glyceryl stearate, glycerol and ethylenediamine extremely Few mixing of one or more.
Preferably, described graphite raw material particle diameter is less than or equal to 10 millimeters.
Secondth, the present invention discloses a kind of special semi-conductive screen Graphene coating of cable and preparation method, is squeezed using screw rod Go out machine, graphite and cementing agent are ground to prepare coating in colloidal state down cut, concrete grammar is as follows：
（1）By the graphite raw material that mass percent is 18-43% and dispersant, the mass percent that mass percent is 0.5-1% Cementing agent for 55-80% mixes dispersion 10-25min in high-speed mixer with the rotating speed of 600-1200rpm, obtains pre-composition；
（2）By step（1）The pre-composition for obtaining is added in screw extruder, and screw machine extrusion is set successively from feed end to discharge end Primary breakup section, shearing thinning section, dispersion orientation section are put, when screw rod is rotated with the rotating speed of 100-1200rpm, in primary breakup Section, the particle diameter of the graphite in pre-composition decreases below 1 millimeter, and is gradually fed forward together with cementing agent；
（3）Step（2）Material continue through shearing thinning section, shearing thinning section graphite shearing abrasive action under, make stone Ink peels off the Graphene for forming single or multiple lift large scale area, forms the cementing agent of Graphene doping；
（4）Step（3）Dispersion orientation section is continued through by shearing the material of thinning section, stabilizer is set in dispersion orientation section and is added Material mouth, in dispersion orientation section the stabilizer that mass percent is 0.5-1% is added, and Graphene is along screw rod direction of rotation in cementing agent In the dispersed orientation opened, form piece shape, and be gradually fed forward, form the special semi-conductive screen Graphene coating of cable.
Preferably, described screw machine be can repeatedly the dual-screw-stem machine of feeding, can repeatedly three screw machines of feeding, can be multiple Four screw machines of feeding；
Described primary breakup section conveys the engagement spiral shell that screwing element, two groups of teeth shape disk, four groups of oblique angles are 60 ° by two group 56/56 Texel part, four groups of reverse 56/56 conveying screwing element compositions；
Described shearing thinning section is by the engagement screw thread unit that the engagement screwing element that four groups of oblique angles are 30 °, four groups of oblique angles are 45 ° Part, four groups reverse 45 ° of engagement screwing element group, four groups 90 ° of right angle engagement screwing element, four groups reverse 60 ° of engagement spiral shell Texel part is constituted；
Described dispersion orientation section conveys the engagement spiral shell that screwing element, two groups of teeth shape disk, four groups of oblique angles are 60 ° by two group 56/56 Texel part, four groups of reverse 56/56 conveying screwing element compositions.
Preferably, it is 50-60 DEG C that described primary breakup section arranges temperature, and it is 60-80 DEG C that shearing thinning section arranges temperature, It is 70-80 DEG C that dispersion orientation section arranges temperature.
Model YJV22 will be coated on after the special semi-conductive screen Graphene paint solvent dispersion of cable prepared by the present invention High tension cable surface can improve cable performance, and performance test is as shown in table 1.
Table 1：
Performance indications Resistance to impact Specific insulation（Ω•m） Adhesive force（Level） Humidity resistance
It is uncoated 10cm 1016 2 600h
After coating（Coating thickness 1.0mm） 55cm 1013 0 1200h
A kind of special semi-conductive screen Graphene coating of cable of the present invention and preparation method, compared with prior art, what it was projected Feature and excellent effect are：
1st, the present invention is directly that raw material passes through screw mechanism for semi-conductive screen Graphene coating using graphite, and production cost is significantly Reduce, and production process non-environmental-pollution, yield height, with significant market using value.
2nd, stripping is sheared by the screw machine of ad hoc structure and prepares Graphene, during screw rod is continued through, graphite shape The orientation of shape in blocks, and the gear block screwing element peeled off by shearing is sheared stripping in the direction of orientation, so as to define The high-quality graphene of radial direction large scale area, protects Graphene perfection of lattice, makes semi-conductive screen Graphene coating With more preferable shielding propertiess.
3rd, the present invention prepare coating can on cable rubber even application, and have high cementability, film property, every From property, shielding.
Specific embodiment
Below by way of specific embodiment, the present invention is described in further detail, but this should not be interpreted as into the present invention Scope be only limitted to Examples below.In the case of without departing from said method thought of the present invention, according to ordinary skill Various replacements or change that knowledge and customary means are made, should be included in the scope of the present invention.
Embodiment 1
（1）It is 18% by mass percent, the dodecyl that particle diameter is 5 millimeters of expanded graphite raw material and mass percent is 1% Sodium sulfate, mass percent are that 80% alkyd resin mixes dispersion 10min in high-speed mixer with the rotating speed of 600rpm, are obtained To pre-composition；
（2）By step（1）The pre-composition for obtaining is added in dual-screw-stem machine, and screw machine extrusion is set gradually from feed end to discharge end Primary breakup section, shearing thinning section, dispersion orientation section, primary breakup section conveys screwing element, two groups of teeth shape by two group 56/56 Disk, four groups of oblique angles are 60 ° of engagement screwing element, convey screwing elements composition for four groups reverse 56/56, and shearing thinning section is by four groups Oblique angle is 30 ° of engagement screwing element, engagement screwing element, four groups reverse 45 ° of the engagement screwing element that four groups of oblique angles are 45 ° Group, four groups 90 ° of right angle engagement screwing element, four groups reverse 60 ° of engagement screwing element composition, dispersion orientation section is by two groups 56/56 conveying screwing element, two groups of teeth shape disk, four groups of oblique angles are 60 ° of engagement screwing element, convey spiral shells for four groups reverse 56/56 Texel part is constituted.It is 50 DEG C that primary breakup section arranges temperature.When screw rod is rotated with the rotating speed of 100rpm, in primary breakup section, in advance The particle diameter of the expanded graphite in mixed thing decreases below 1 millimeter, and is gradually fed forward together with cementing agent.
（3）Step（2）Material continue through shearing thinning section, the temperature for arranging shearing thinning section is 80 DEG C, in shearing Thinning section graphite makes graphite peel off the Graphene to form single or multiple lift large scale area, shape under screw machine shear action Into the cementing agent of Graphene doping；
（4）Step（3）Dispersion orientation section is continued through by shearing the material of thinning section, it is 80 to arrange temperature in dispersion orientation section DEG C dispersion orientation section arrange Pulvis Talci charge door, dispersion orientation section add 1% Pulvis Talci, Graphene is along screw rod rotation side Open to dispersed in cementing agent, form the orientation of piece shape, and be gradually fed forward, form the special semi-conductive screen stone of cable Black alkene coating.
The special semi-conductive screen Graphene coating of cable prepared in embodiment one is coated on into model YJV22 high pressure Cable surface, it is as shown in table 2 that Jing tests obtain performance parameter.
Embodiment 2
（1）It is 20% by mass percent, the dodecane that particle diameter is 6 millimeters of thermal cracking graphite raw material and mass percent is 1% Base benzene sulfonic acid sodium salt, mass percent are that 78% polypropylene ester mixes dispersion in high-speed mixer with the rotating speed of 700rpm 13min, obtains pre-composition；
（2）By step（1）The pre-composition for obtaining is added in dual-screw-stem machine, and screw machine extrusion is set gradually from feed end to discharge end Primary breakup section, shearing thinning section, dispersion orientation section, primary breakup section conveys screwing element, two groups of teeth shape by two group 56/56 Disk, four groups of oblique angles are 60 ° of engagement screwing element, convey screwing elements composition for four groups reverse 56/56, and shearing thinning section is by four groups Oblique angle is 30 ° of engagement screwing element, engagement screwing element, four groups reverse 45 ° of the engagement screwing element that four groups of oblique angles are 45 ° Group, four groups 90 ° of right angle engagement screwing element, four groups reverse 60 ° of engagement screwing element composition, dispersion orientation section is by two groups 56/56 conveying screwing element, two groups of teeth shape disk, four groups of oblique angles are 60 ° of engagement screwing element, convey spiral shells for four groups reverse 56/56 Texel part is constituted.It is 60 DEG C that primary breakup section arranges temperature.When screw rod is rotated with the rotating speed of 300rpm, in primary breakup section, in advance The particle diameter of the expanded graphite in mixed thing decreases below 1 millimeter, and is gradually fed forward together with cementing agent.
（3）Step（2）Material continue through shearing thinning section, the temperature for arranging shearing thinning section is 70 DEG C, in shearing Thinning section graphite makes graphite peel off the Graphene to form single or multiple lift large scale area, shape under screw machine shear action Into the cementing agent of Graphene doping；
（4）Step（3）Dispersion orientation section is continued through by shearing the material of thinning section, it is 80 to arrange temperature in dispersion orientation section DEG C single glyceryl stearate charge door is set in dispersion orientation section, in dispersion orientation section 1% single glyceryl stearate, stone are added Black alkene is opened along screw rod direction of rotation is dispersed in cementing agent, forms the orientation of piece shape, and is gradually fed forward, and forms cable Special semi-conductive screen Graphene coating.
The special semi-conductive screen Graphene coating of cable prepared in embodiment two is coated on into model YJV22 high pressure Cable surface, it is as shown in table 2 that Jing tests obtain performance parameter.
Embodiment 3
（1）It is 30% by mass percent, particle diameter is 3 millimeters of graphite oxide raw material and mass percent is 1% 1- pyridine acids, Mass percent is that 78% acrylic resin mixes dispersion 15min in high-speed mixer with the rotating speed of 800rpm, is premixed Thing；
（2）By step（1）The pre-composition for obtaining is added in three screw machines, and screw machine extrusion is set gradually from feed end to discharge end Primary breakup section, shearing thinning section, dispersion orientation section, primary breakup section conveys screwing element, two groups of teeth shape by two group 56/56 Disk, four groups of oblique angles are 60 ° of engagement screwing element, convey screwing elements composition for four groups reverse 56/56, and shearing thinning section is by four groups Oblique angle is 30 ° of engagement screwing element, engagement screwing element, four groups reverse 45 ° of the engagement screwing element that four groups of oblique angles are 45 ° Group, four groups 90 ° of right angle engagement screwing element, four groups reverse 60 ° of engagement screwing element composition, dispersion orientation section is by two groups 56/56 conveying screwing element, two groups of teeth shape disk, four groups of oblique angles are 60 ° of engagement screwing element, convey spiral shells for four groups reverse 56/56 Texel part is constituted.It is 55 DEG C that primary breakup section arranges temperature.When screw rod is rotated with the rotating speed of 600rpm, in primary breakup section, in advance The particle diameter of the expanded graphite in mixed thing decreases below 1 millimeter, and is gradually fed forward together with cementing agent.
（3）Step（2）Material continue through shearing thinning section, the temperature for arranging shearing thinning section is 70 DEG C, in shearing Thinning section graphite makes graphite peel off the Graphene to form single or multiple lift large scale area, shape under screw machine shear action Into the cementing agent of Graphene doping；
（4）Step（3）Dispersion orientation section is continued through by shearing the material of thinning section, it is 80 to arrange temperature in dispersion orientation section DEG C dispersion orientation section arrange ethylenediamine charge door, dispersion orientation section add 1% ethylenediamine, Graphene is along screw rod rotation side Open to dispersed in cementing agent, form the orientation of piece shape, and be gradually fed forward, form the special semi-conductive screen stone of cable Black alkene coating.
The special semi-conductive screen Graphene coating of cable prepared in embodiment three is coated on into model YJV22 high pressure Cable surface, it is as shown in table 2 that Jing tests obtain performance parameter.
Embodiment 4
（1）It is 40% by mass percent, the polyethylene pyrrole that particle diameter is 9 millimeters of crystalline flake graphite raw material and mass percent is 1% Pyrrolidone, mass percent are that 58% polyurethane resin mixes dispersion 19min in high-speed mixer with the rotating speed of 1000rpm, Obtain pre-composition；
（2）By step（1）The pre-composition for obtaining is added in three screw machines, and screw machine extrusion is set gradually from feed end to discharge end Primary breakup section, shearing thinning section, dispersion orientation section, primary breakup section conveys screwing element, two groups of teeth shape by two group 56/56 Disk, four groups of oblique angles are 60 ° of engagement screwing element, convey screwing elements composition for four groups reverse 56/56, and shearing thinning section is by four groups Oblique angle is 30 ° of engagement screwing element, engagement screwing element, four groups reverse 45 ° of the engagement screwing element that four groups of oblique angles are 45 ° Group, four groups 90 ° of right angle engagement screwing element, four groups reverse 60 ° of engagement screwing element composition, dispersion orientation section is by two groups 56/56 conveying screwing element, two groups of teeth shape disk, four groups of oblique angles are 60 ° of engagement screwing element, convey spiral shells for four groups reverse 56/56 Texel part is constituted.It is 60 DEG C that primary breakup section arranges temperature.When screw rod is rotated with the rotating speed of 800rpm, in primary breakup section, in advance The particle diameter of the expanded graphite in mixed thing decreases below 1 millimeter, and is gradually fed forward together with cementing agent.
（3）Step（2）Material continue through shearing thinning section, the temperature for arranging shearing thinning section is 60 DEG C, in shearing Thinning section graphite makes graphite peel off the Graphene to form single or multiple lift large scale area, shape under screw machine shear action Into the cementing agent of Graphene doping；
（4）Step（3）Dispersion orientation section is continued through by shearing the material of thinning section, it is 75 to arrange temperature in dispersion orientation section DEG C dispersion orientation section arrange tetramethylolmethane charge door, dispersion orientation section add 1.0% tetramethylolmethane, Graphene is along screw rod Direction of rotation is dispersed in cementing agent to open, and forms the orientation of piece shape, and is gradually fed forward, and forms the special semiconductive of cable Shielding Graphene coating.
Type will be coated on after the special semi-conductive screen Graphene paint solvent modulation of cable prepared in example IV Number be YJV22 high tension cables surface, Jing test obtain performance parameter it is as shown in table 2.
Table 2
Performance indications（Coating thickness 1.0mm） Resistance to impact Specific insulation（Ω•m） Adhesive force（Level） Humidity resistance
Embodiment one 51cm 1013 0 1120h
Embodiment two 55cm 1013 0 1200h
Embodiment three 52cm 1013 0 1050h
Example IV 50cm 1013 0 1190h

Claims (5)

1. the special semi-conductive screen Graphene coating of a kind of cable, it is characterised in that prepared by the raw material of following mass percents and Into：
Graphite raw material 18-43%
Cementing agent 55-80%
Dispersant 0.5-1%
Stabilizer 0.5-1%
Wherein, described graphite raw material is in crystalline flake graphite, expanded graphite, highly oriented graphite, thermal cracking graphite, graphite oxide At least one, described cementing agent is in alkyd resin, polyurethane resin, polypropylene ester, acrylic resin and phenolic resin At least one, described dispersant is sodium lauryl sulphate, dodecylbenzene sodium sulfonate, polyvinylpyrrolidone, 1- pyridines At least one in acid, the stabilizer is in tetramethylolmethane, Pulvis Talci, single glyceryl stearate, glycerol and ethylenediamine At least one or several mixing；
The special semi-conductive screen Graphene coating of the cable, is prepared by the following method：
（1）By the graphite raw material that mass percent is 18-43% and dispersant, the mass percent that mass percent is 0.5-1% Cementing agent for 55-80% mixes dispersion 10-25min in high-speed mixer with the rotating speed of 600-1200rpm, obtains pre-composition；
（2）By step（1）The pre-composition for obtaining is added in screw extruder, and screw machine extrusion is set successively from feed end to discharge end Primary breakup section, shearing thinning section, dispersion orientation section are put, when screw rod is rotated with the rotating speed of 100-1200rpm, in primary breakup Section, the particle diameter of the graphite in pre-composition decreases below 1 millimeter, and is gradually fed forward together with cementing agent；
（3）Step（2）Material continue through shearing thinning section, shearing thinning section graphite shearing abrasive action under, make stone Ink peels off the Graphene for forming single or multiple lift large scale area, forms the cementing agent of Graphene doping；
（4）Step（3）Dispersion orientation section is continued through by shearing the material of thinning section, stabilizer is set in dispersion orientation section and is added Material mouth, in dispersion orientation section the stabilizer that mass percent is 0.5-1% is added, and Graphene is along screw rod direction of rotation in cementing agent In the dispersed orientation opened, form piece shape, and be gradually fed forward, form the special semi-conductive screen Graphene coating of cable.
2. a kind of special semi-conductive screen Graphene coating of cable according to claim 1, it is characterised in that described graphite Raw material particle size is less than or equal to 10 millimeters.
3. the preparation method of the special semi-conductive screen Graphene coating of a kind of cable, it is characterised in that adopt screw extruder, will Graphite grinds to prepare coating with cementing agent in colloidal state down cut, and concrete grammar is as follows：
（1）By the graphite raw material that mass percent is 18-43% and dispersant, the mass percent that mass percent is 0.5-1% Cementing agent for 55-80% mixes dispersion 10-25min in high-speed mixer with the rotating speed of 600-1200rpm, obtains pre-composition；
（2）By step（1）The pre-composition for obtaining is added in screw extruder, and screw machine extrusion is set successively from feed end to discharge end Primary breakup section, shearing thinning section, dispersion orientation section are put, when screw rod is rotated with the rotating speed of 100-1200rpm, in primary breakup Section, the particle diameter of the graphite in pre-composition decreases below 1 millimeter, and is gradually fed forward together with cementing agent；
（3）Step（2）Material continue through shearing thinning section, shearing thinning section graphite shearing abrasive action under, make stone Ink peels off the Graphene for forming single or multiple lift large scale area, forms the cementing agent of Graphene doping；
（4）Step（3）Dispersion orientation section is continued through by shearing the material of thinning section, stabilizer is set in dispersion orientation section and is added Material mouth, in dispersion orientation section the stabilizer that mass percent is 0.5-1% is added, and Graphene is along screw rod direction of rotation in cementing agent In the dispersed orientation opened, form piece shape, and be gradually fed forward, form the special semi-conductive screen Graphene coating of cable.
4. the preparation method of the special semi-conductive screen Graphene coating of a kind of cable according to claim 3, it is characterised in that Described screw machine be can repeatedly the dual-screw-stem machine of feeding, can repeatedly three screw machines of feeding, can multiple feeding four screw machines； Described primary breakup section conveys the engagement screw thread unit that screwing element, two groups of teeth shape disk, four groups of oblique angles are 60 ° by two group 56/56 Part, four groups of reverse 56/56 conveying screwing element compositions；Described shearing thinning section is by the engagement screw thread unit that four groups of oblique angles are 30 ° Part, four groups of oblique angles are 45 ° of engagement screwing element, four groups reverse 45 ° of engagement screwing element group, the engagement of four groups 90 ° of right angle Screwing element, four groups reverse 60 ° of engagement screwing element composition；Described dispersion orientation section conveys screw thread unit by two group 56/56 Part, two groups of teeth shape disk, four groups of oblique angles are 60 ° of engagement screwing element, convey screwing elements composition for four groups reverse 56/56.
5. the preparation method of the special semi-conductive screen Graphene coating of a kind of cable according to claim 4, it is characterised in that It is 50-60 DEG C that described primary breakup section arranges temperature, and it is 60-80 DEG C that shearing thinning section arranges temperature, and dispersion orientation section is arranged Temperature is 70-80 DEG C.
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